President Enrique Peña Nieto and Republican presidential nominee Donald Trump speak during a joint conference in Mexico City: Mr Peña Nieto has faced a fierce backlash at home over what many saw as his red carpet treatment of Mr Trump. Photograph: Susana Gonzalez/Bloomberg

So you want to play hardball, Mr Trump? Mexico is to consider revoking a series of treaties – including the 1848 agreement that transferred half its (...)